Ouch - your MIL sounds like someone you definitely can't trust (good call on your part) and maybe the booze is more of a problem than you think! That said, you wouldn't have known what your MIL said if your husband hadn't told you so maybe the conversations should start with him. His job should be to defend you and your marriage and tell her emphatically he will not accept any negative talk about you from her. MIL may be a problem but she is not the most important issue here. You relationship with your husband is.